Robert R. Dykstra, The Cattle Towns. A Social History of the Kansas Cattle Trading Centres (New York: Alfred A. Knopf, 1968, $8.95). Pp. 386, x. - David M. Ellis (ed.), The Frontier in American Development (Ithaca and London: Cornell University Press, 1969, 119s.). Pp. xxx, 425. - David B. GracyII, Littlefield Lands Colonisation on the Texas Plains, 1912–1920 (Austin and London: University of Texas Press, 1968, $5.00). Pp. x, 161. - C. Alan Hutchinson, Frontier Settlement in Mexican California (New Haven and London: Yale University Press, 1969, $10.00). Pp. xv, 457. - Catherine W. McDowell (ed.), Now You Hear My Horn: The Journal of James Wilson Nichols 1820–1887 (Austin and London: University of Texas Press, 1967, 71s. 6d.). Pp. xix, 212. - J. Orin Oliphant, On the Cattle Ranges of the Oregon Country (Seattle and London: University of Washington Press, 1968, $8.95). Pp. ix, 372.